1 /*
2 * Lec arp cache
3 * Marko Kiiskila carnil@cs.tut.fi
4 *
5 */
6 #ifndef _LEC_ARP_H
7 #define _LEC_ARP_H
8 #include <linux/atm.h>
9 #include <linux/atmdev.h>
10 #include <linux/if_ether.h>
11 #include <linux/atmlec.h>
12
13 struct lec_arp_table {
14 struct lec_arp_table *next; /* Linked entry list */
15 unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */
16 unsigned char mac_addr[ETH_ALEN]; /* Mac address */
17 int is_rdesc; /* Mac address is a route descriptor */
18 struct atm_vcc *vcc; /* Vcc this entry is attached */
19 struct atm_vcc *recv_vcc; /* Vcc we receive data from */
20 void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
21 /* Push that leads to daemon */
22 void (*old_recv_push)(struct atm_vcc *vcc, struct sk_buff *skb);
23 /* Push that leads to daemon */
24 void (*old_close)(struct atm_vcc *vcc);
25 /* We want to see when this
26 * vcc gets closed */
27 unsigned long last_used; /* For expiry */
28 unsigned long timestamp; /* Used for various timestamping
29 * things:
30 * 1. FLUSH started
31 * (status=ESI_FLUSH_PENDING)
32 * 2. Counting to
33 * max_unknown_frame_time
34 * (status=ESI_ARP_PENDING||
35 * status=ESI_VC_PENDING)
36 */
37 unsigned char no_tries; /* No of times arp retry has been
38 tried */
39 unsigned char status; /* Status of this entry */
40 unsigned short flags; /* Flags for this entry */
41 unsigned short packets_flooded; /* Data packets flooded */
42 unsigned long flush_tran_id; /* Transaction id in flush protocol */
43 struct timer_list timer; /* Arping timer */
44 struct lec_priv *priv; /* Pointer back */
45
46 u8 *tlvs; /* LANE2: Each MAC address can have TLVs */
47 u32 sizeoftlvs; /* associated with it. sizeoftlvs tells the */
48 /* the length of the tlvs array */
49 struct sk_buff_head tx_wait; /* wait queue for outgoing packets */
50 };
51
52 struct tlv { /* LANE2: Template tlv struct for accessing */
53 /* the tlvs in the lec_arp_table->tlvs array*/
54 u32 type;
55 u8 length;
56 u8 value[255];
57 };
58
59 /* Status fields */
60 #define ESI_UNKNOWN 0 /*
61 * Next packet sent to this mac address
62 * causes ARP-request to be sent
63 */
64 #define ESI_ARP_PENDING 1 /*
65 * There is no ATM address associated with this
66 * 48-bit address. The LE-ARP protocol is in
67 * progress.
68 */
69 #define ESI_VC_PENDING 2 /*
70 * There is a valid ATM address associated with
71 * this 48-bit address but there is no VC set
72 * up to that ATM address. The signaling
73 * protocol is in process.
74 */
75 #define ESI_FLUSH_PENDING 4 /*
76 * The LEC has been notified of the FLUSH_START
77 * status and it is assumed that the flush
78 * protocol is in process.
79 */
80 #define ESI_FORWARD_DIRECT 5 /*
81 * Either the Path Switching Delay (C22) has
82 * elapsed or the LEC has notified the Mapping
83 * that the flush protocol has completed. In
84 * either case, it is safe to forward packets
85 * to this address via the data direct VC.
86 */
87
88 /* Flag values */
89 #define LEC_REMOTE_FLAG 0x0001
90 #define LEC_PERMANENT_FLAG 0x0002
91
92 /* Protos */
93 void lec_arp_init(struct lec_priv *priv);
94 int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
95 void lec_arp_destroy(struct lec_priv *priv);
96 void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
97
98 struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
99 unsigned char *mac_to_addr,
100 int is_rdesc,
101 struct lec_arp_table **ret_entry);
102 void lec_vcc_added(struct lec_priv *dev,
103 struct atmlec_ioc *ioc_data, struct atm_vcc *vcc,
104 void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb));
105 void lec_arp_check_empties(struct lec_priv *priv,
106 struct atm_vcc *vcc, struct sk_buff *skb);
107 int lec_addr_delete(struct lec_priv *priv,
108 unsigned char *mac_addr, unsigned long permanent);
109 void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
110 void lec_arp_update(struct lec_priv *priv,
111 unsigned char *mac_addr, unsigned char *atm_addr,
112 unsigned long remoteflag, unsigned int targetless_le_arp);
113 void lec_set_flush_tran_id(struct lec_priv *priv,
114 unsigned char *mac_addr, unsigned long tran_id);
115
116 #endif
117
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